N series: no time limit for protection of non-oily suspended particles
R series: Protection against non-oily suspended particles and sweat-oily suspended particles for eight hours
P series: Protection of non-oily suspended particles and sweat-oily suspended particles without time limit
When the carrier of some particulate matter is oily, and these substances attached to the electrostatic non-woven fabric will reduce the electrical properties and allow the fine dust to penetrate. Therefore, the anti-aerosol-containing filter material must undergo special electrostatic treatment to prevent fineness. The purpose of dust. Therefore, each series is divided into 3 levels: 95%, 99%, 99.97% (referred to as 95, 99, 100), so there are 9 sub-categories of filter media.
European Union EN149 standard:
FFP1 masks: the lowest filtering effect is 80%
FFP2 mask: the lowest filtering effect is 94%
FFP3 masks: the lowest filtering effect is 97%
Australia AS1716 standard
P1: The minimum filtering effect is 80%
P2: The lowest filtering effect is 94%
Japanese MOL verification standards:
According to Japan’s Decree No. 0207006 promulgated on February 7, 2005, the standard for dust masks
Chinese national standard GB6223-86UDC614.894:
The above inspection standards except the Japanese standard (0.06-0.1 micron) are tested with a particle size of 0.3 micron. The detection flow rate of the European standard is 95L/min, and the American standard is 85L/min. my country’s national standard uses more than 90% of the suspended particle size of <5 microns, and more than 70% of <2 microns, and the flow value is 42.5L/min.
